/*!===========================================================================
 *  PRESTIGE — 高端企业官网模板（中英双语 · 配置驱动 · 纯静态）
 *  -------------------------------------------------------------------------
 *  授权：MIT License（页面骨架源自 Start Bootstrap "Grayscale"，MIT 许可，
 *  详见项目根目录 LICENSE 文件。MIT 允许商业使用与再授权，可放心交付客户。）
 *  色板与文案均可在 assets/js/site-config.js 中一键替换。
 * ==========================================================================*/

/* ============ 1. Design Tokens ============ */
:root {
  /* 品牌色（可通过 site-config.js 的 theme 一键覆盖） */
  --gold:        #c8a569;   /* 主金 */
  --gold-b:      #ecd6a1;   /* 亮金 */
  --gold-d:      #9a7a40;   /* 暗金 */
  --dark:        #0a0a0c;   /* 最深底 */
  --dark-2:      #101014;   /* 次级底 */
  --dark-3:      #17171d;   /* 卡片底 */
  --paper:       #f7f2e8;   /* 米白（浅色段落底） */
  --paper-2:     #efe8d8;

  /* 文本（深底上用） */
  --tx:          #ece6d6;
  --tx-2:        rgba(236, 230, 214, .62);
  --tx-3:        rgba(236, 230, 214, .42);
  --line:        rgba(200, 165, 105, .18);
  --line-soft:   rgba(236, 230, 214, .1);

  /* 浅色段落内自动反转的文本色 */
  --tx-inv:      #191611;
  --tx-inv-2:    #6f6757;
  --line-inv:    rgba(25, 22, 17, .14);
  --line-inv-2:  rgba(25, 22, 17, .08);

  --font-display: "Cormorant Garamond", "Noto Serif SC", "Source Han Serif SC",
                  "Songti SC", "STSong", Georgia, "Times New Roman", serif;
  --font-body:   -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
                 "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;

  --container: 1200px;
  --gutter: clamp(20px, 5vw, 56px);
  --pad-sec: clamp(84px, 10vw, 150px);
  --ease: cubic-bezier(.19, 1, .22, 1);
  --nav-h: 84px;
}

/* 浅色区块用：切换令牌，组件无需重写 */
.section-light {
  --tx:      var(--tx-inv);
  --tx-2:    var(--tx-inv-2);
  --tx-3:    rgba(25, 22, 17, .5);
  --line:    var(--line-inv);
  --line-soft: var(--line-inv-2);
  background: var(--paper);
  color: var(--tx);
}

/* ============ 2. Base / Reset ============ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--dark);
  color: var(--tx);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }
h1, h2, h3, h4, p { margin: 0; }
::selection { background: var(--gold); color: var(--dark); }
:focus-visible { outline: 1px solid var(--gold); outline-offset: 3px; }

.container {
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

/* 入场动画（仅在启用 JS 时隐藏，避免无 JS 白屏） */
.reveal { opacity: 1; transform: none; }
.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.js .reveal.in { opacity: 1; transform: none; }
.js .reveal.d1 { transition-delay: .08s; }
.js .reveal.d2 { transition-delay: .16s; }
.js .reveal.d3 { transition-delay: .24s; }

/* ============ 3. Typography helpers ============ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
}
.eyebrow::before { content: ""; width: 42px; height: 1px; background: var(--gold); }
.sec-head { margin-bottom: clamp(40px, 6vw, 72px); }
.sec-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.9rem, 4.2vw, 3.3rem);
  line-height: 1.28;
  letter-spacing: .02em;
  margin-top: 18px;
}
.sec-lead { color: var(--tx-2); max-width: 640px; margin-top: 18px; font-size: 15.5px; }
.sec-title em, .hl { font-style: italic; color: var(--gold-b); }
.section-light .sec-title em,
.section-light .hl { color: var(--gold-d); }
.sec-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(40px, 6vw, 90px); align-items: end; }
.sec-grid .sec-lead { max-width: none; }

/* ============ 4. Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 15px 34px;
  font-size: 14px;
  letter-spacing: .16em;
  text-transform: uppercase;
  position: relative;
  transition: all .35s var(--ease);
  overflow: hidden;
  white-space: nowrap;
}
.btn .arr { transition: transform .35s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
.btn-gold { background: linear-gradient(135deg, var(--gold-b), var(--gold)); color: var(--dark); font-weight: 700; }
.btn-gold:hover { box-shadow: 0 12px 30px -10px rgba(200, 165, 105, .55); transform: translateY(-2px); }
.btn-line { border: 1px solid var(--line); color: var(--tx); }
.btn-line::after { content: ""; position: absolute; inset: auto 0 0 0; height: 1px; background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease); }
.btn-line:hover { color: var(--gold-b); border-color: rgba(200, 165, 105, .4); }
.btn-line:hover::after { transform: scaleX(1); }
.btn-ghost-sm { font-size: 12.5px; letter-spacing: .18em; padding: 10px 22px; }

/* ============ 5. Header / Nav ============ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s;
}
.site-header.is-solid {
  background: rgba(8, 8, 10, .82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.nav { height: var(--nav-h); display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 34px; height: 34px; flex: none;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
  display: grid; place-items: center;
  position: relative;
}
.brand-mark i {
  width: 12px; height: 12px; transform: rotate(-45deg);
  background: linear-gradient(135deg, var(--gold-b), var(--gold));
  display: block;
}
.brand-name { display: grid; line-height: 1.1; }
.brand-cn { font-family: var(--font-display); font-size: 19px; letter-spacing: .24em; font-weight: 600; }
.brand-en { font-size: 9.5px; letter-spacing: .5em; color: var(--gold); text-transform: uppercase; margin-top: 3px; }
.nav-links { display: flex; gap: clamp(18px, 2.4vw, 36px); margin-left: auto; }
.nav-links a {
  position: relative;
  font-size: 13.5px;
  letter-spacing: .14em;
  padding: 8px 0;
  color: var(--tx-2);
  transition: color .3s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--gold);
  transform: scaleX(0); transform-origin: right;
  transition: transform .4s var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--tx); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); transform-origin: left; }
.nav-actions { display: flex; align-items: center; gap: 20px; }
.lang { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; }
.lang button { letter-spacing: .12em; color: var(--tx-3); padding: 4px 0; position: relative; transition: color .3s; }
.lang button.on { color: var(--gold-b); }
.lang button:not(.on):hover { color: var(--tx); }
.lang .sep { color: var(--line); }

.nav-toggle { display: none; width: 42px; height: 42px; position: relative; z-index: 5; }
.nav-toggle span {
  position: absolute; left: 9px; width: 24px; height: 1.6px; background: var(--tx);
  transition: all .35s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; width: 16px; right: 9px; left: auto; }
.nav-toggle span:nth-child(3) { top: 27px; }
.site-header.is-open .nav-toggle span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.site-header.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
.site-header.is-open .nav-toggle span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

/* 移动端菜单抽屉 */
.mobile-menu {
  position: fixed; inset: 0; z-index: 55;
  background: rgba(7, 7, 9, .97);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: opacity .4s var(--ease), visibility .4s;
}
.mobile-menu.is-on { opacity: 1; visibility: visible; }
.mobile-menu ul { text-align: center; display: grid; gap: 8px; }
.mobile-menu a {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 7vw, 2.6rem);
  padding: 10px 20px; display: inline-block;
  color: var(--tx-2); transition: color .3s, letter-spacing .5s var(--ease);
}
.mobile-menu a:hover { color: var(--gold-b); letter-spacing: .12em; }

/* ============ 6. Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  background-color: var(--dark);
  background-size: cover;
  background-position: center 30%;
  overflow: hidden;
  padding: calc(var(--nav-h) + 40px) 0 60px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(8,8,10,.72) 0%, rgba(8,8,10,.25) 40%, rgba(8,8,10,.9) 100%),
    radial-gradient(120% 90% at 50% 0%, rgba(200,165,105,.12), transparent 55%);
}
.hero > .container { position: relative; z-index: 2; }
.hero-overline {
  display: inline-flex; align-items: center; gap: 16px;
  color: var(--gold-b); font-size: 12.5px; letter-spacing: .5em;
  text-transform: uppercase;
}
.hero-overline::before, .hero-overline::after { content: ""; width: clamp(30px, 6vw, 64px); height: 1px; background: linear-gradient(90deg, transparent, var(--gold)); }
.hero-overline::after { background: linear-gradient(90deg, var(--gold), transparent); }
.hero-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.7rem, 7.4vw, 6.4rem);
  line-height: 1.12;
  letter-spacing: .04em;
  margin: 26px auto 0;
  text-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.hero-title em { font-style: italic; color: var(--gold-b); }
.hero-en {
  margin-top: 20px;
  font-family: var(--font-display);
  font-style: italic;
  color: var(--tx-3);
  letter-spacing: .3em;
  text-transform: uppercase;
  font-size: clamp(.8rem, 1.6vw, 1.05rem);
}
.hero-sub {
  max-width: 620px; margin: 24px auto 0;
  color: var(--tx-2); font-size: 16px;
}
.hero-actions { margin-top: 42px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.hero-line { display: none; }
.hero-scroll {
  position: absolute; left: 50%; bottom: 26px; z-index: 2;
  transform: translateX(-50%);
  display: grid; justify-items: center; gap: 8px;
  color: var(--tx-3); font-size: 11px; letter-spacing: .4em;
}
.hero-scroll i {
  width: 1px; height: 46px; display: block;
  background: linear-gradient(180deg, var(--gold), transparent);
  overflow: hidden; position: relative;
}
.hero-scroll i::after {
  content: ""; position: absolute; left: 0; top: -100%;
  width: 100%; height: 50%;
  background: var(--gold-b);
  animation: drop 2.2s var(--ease) infinite;
}
@keyframes drop { 0% { top: -60%; } 60%, 100% { top: 110%; } }

/* ============ 7. Clients strip ============ */
.clients { background: var(--dark); border-top: 1px solid var(--line-soft); padding: 30px 0; }
.clients .container { display: flex; align-items: center; gap: 34px; flex-wrap: wrap; }
.clients-t { font-size: 11px; letter-spacing: .4em; color: var(--tx-3); text-transform: uppercase; flex: none; }
.clients-row { display: flex; flex-wrap: wrap; gap: 12px 38px; align-items: center; }
.clients-row span {
  font-family: var(--font-display);
  font-size: 17px; letter-spacing: .18em;
  color: var(--tx-3);
  transition: color .3s;
  white-space: nowrap;
}
.clients-row span:hover { color: var(--gold-b); }

/* ============ 8. About (light) ============ */
.about { position: relative; overflow: hidden; }
.about-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: clamp(48px, 7vw, 110px); align-items: center; }
.about-media { position: relative; }
.about-media .frame {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
}
.about-media .frame img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.02); transition: transform 1.4s var(--ease); }
.about:hover .about-media .frame img { transform: scale(1.07); }
.about-media::before {
  content: ""; position: absolute; inset: -22px auto auto -22px; z-index: -1;
  width: 64%; height: 64%;
  border: 1px solid var(--line);
}
.about-media .frame::after {
  content: ""; position: absolute; inset: auto -22px -22px auto;
  width: 42%; height: 30%;
  background: var(--gold);
  opacity: .9; z-index: 1;
}
.about-stamp {
  position: absolute; z-index: 3;
  right: -18px; bottom: 34px;
  width: 132px; height: 132px;
  background: var(--dark);
  color: var(--gold-b);
  border-radius: 50%;
  display: grid; place-items: center; text-align: center;
  padding: 18px;
  font-family: var(--font-display);
  line-height: 1.3;
  box-shadow: var(--shadow);
  animation: spin 22s linear infinite;
  border: 1px dashed rgba(200,165,105,.4);
}
.about-stamp b { font-size: 15px; letter-spacing: .2em; font-weight: 500; }
@keyframes spin { to { transform: rotate(360deg); } }
.about-stamp span { display: block; }

.about-copy p.body { color: var(--tx-2); font-size: 15.5px; margin-top: 20px; }
.about-list { display: grid; gap: 16px; margin-top: 34px; }
.about-list li {
  display: flex; gap: 14px; align-items: baseline;
  color: var(--tx-2); font-size: 15px;
}
.about-list i {
  flex: none; font-style: normal; color: var(--gold);
  font-size: 10px; transform: translateY(-2px);
}
.about-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  margin-top: 56px; padding-top: 34px;
  border-top: 1px solid var(--line);
  gap: 20px;
}
.stat b {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(2rem, 3.4vw, 3rem); color: var(--gold-d);
  display: block; line-height: 1;
}
.stat b i { font-style: normal; font-size: .55em; margin-left: 2px; }
.stat span { font-size: 13px; letter-spacing: .08em; color: var(--tx-3); }
.stat { position: relative; padding-left: 20px; }
.stat::before { content: ""; position: absolute; left: 0; top: 6px; width: 1px; height: 70%; background: var(--gold); opacity: .5; }

/* ============ 9. Services (dark) ============ */
.services { background: var(--dark); position: relative; }
.services::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(80% 60% at 85% 0%, rgba(200,165,105,.06), transparent 60%),
    radial-gradient(70% 55% at 0% 100%, rgba(200,165,105,.04), transparent 60%);
  pointer-events: none;
}
.services .container { position: relative; }
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); }
.svc {
  background: var(--dark-2);
  padding: clamp(30px, 3.4vw, 48px);
  position: relative;
  overflow: hidden;
  transition: background .45s var(--ease);
}
.svc::before {
  content: ""; position: absolute; inset: 0 auto auto 0;
  width: 3px; height: 0; background: var(--gold);
  transition: height .5s var(--ease);
}
.svc:hover { background: var(--dark-3); }
.svc:hover::before { height: 100%; }
.svc-top { display: flex; justify-content: space-between; align-items: center; }
.svc-no { font-family: var(--font-display); font-style: italic; color: var(--gold); font-size: 20px; }
.svc-ico { font-size: 26px; opacity: .85; transition: transform .5s var(--ease); color: var(--tx-3); }
.svc:hover .svc-ico { transform: translateY(-4px) rotate(-6deg); color: var(--gold-b); }
.svc h3 { font-family: var(--font-display); font-size: 22px; font-weight: 500; margin-top: 26px; letter-spacing: .04em; }
.svc p { color: var(--tx-2); font-size: 14px; margin-top: 12px; }
.svc-more {
  margin-top: 26px; display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--tx-3); transition: color .3s;
}
.svc:hover .svc-more { color: var(--gold-b); }

/* ============ 10. Quote banner ============ */
.quote {
  position: relative;
  padding: var(--pad-sec) 0;
  background-color: var(--dark);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  text-align: center;
  overflow: hidden;
}
.quote::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(8,8,10,.86), rgba(8,8,10,.6) 45%, rgba(8,8,10,.9));
}
.quote .container { position: relative; z-index: 2; }
.quote-mark {
  font-family: var(--font-display);
  font-size: 120px; line-height: .4;
  color: var(--gold);
  display: block; margin-bottom: 34px;
}
.quote p {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.7rem);
  line-height: 1.6;
  max-width: 900px; margin-inline: auto;
  letter-spacing: .03em;
}
.quote footer { margin-top: 30px; color: var(--tx-2); font-size: 13px; letter-spacing: .3em; text-transform: uppercase; }
.quote footer::before { content: "—— "; color: var(--gold); }
.quote footer em { font-style: normal; color: var(--gold-b); letter-spacing: .2em; margin-left: 8px; font-style: italic; }

/* ============ 11. Works (light) ============ */
.works { position: relative; }
.works-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(30px, 4vw, 64px); }
.work { position: relative; }
.work:nth-child(even) { margin-top: clamp(40px, 6vw, 90px); }
.work-media {
  position: relative; overflow: hidden; aspect-ratio: 4 / 3;
  background: var(--dark-3);
}
.work-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1.3s var(--ease), opacity .5s;
}
.work:hover .work-media img { transform: scale(1.06); }
.work-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(8,8,10,.72));
  opacity: 0; transition: opacity .5s;
}
.work:hover .work-media::after { opacity: 1; }
.work-num {
  position: absolute; left: 18px; top: 16px; z-index: 2;
  font-family: var(--font-display); font-style: italic;
  color: var(--dark); background: var(--gold-b);
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 15px; transform: translateY(-4px);
  opacity: 0; transition: all .4s var(--ease);
}
.work:hover .work-num { opacity: 1; transform: none; }
.work-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 18px; gap: 16px; }
.work h3 { font-family: var(--font-display); font-size: clamp(1.2rem, 2vw, 1.6rem); font-weight: 500; }
.work .cat { font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--gold-d); margin-top: 6px; }
.work-arrow {
  flex: none; width: 46px; height: 46px; border: 1px solid var(--line);
  border-radius: 50%; display: grid; place-items: center;
  transition: all .4s var(--ease); color: var(--tx-2);
}
.work:hover .work-arrow { background: var(--dark); color: var(--gold-b); border-color: var(--dark); transform: translate(4px, -4px); }
.works-more { margin-top: clamp(44px, 6vw, 80px); text-align: center; }

/* ============ 12. Process (dark) ============ */
.process { background: var(--dark); }
.process-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.proc {
  background: var(--dark-2);
  padding: clamp(28px, 3vw, 44px);
  position: relative;
}
.proc b {
  font-family: var(--font-display); font-style: italic;
  font-size: clamp(3rem, 5vw, 4.4rem); font-weight: 500;
  color: transparent;
  -webkit-text-stroke: 1px rgba(200,165,105,.55);
  display: block; line-height: 1;
}
.proc:nth-child(odd) b { -webkit-text-stroke-color: rgba(200,165,105,.85); }
.proc h3 { margin-top: 20px; font-family: var(--font-display); font-weight: 500; font-size: 20px; letter-spacing: .05em; }
.proc p { color: var(--tx-2); font-size: 13.5px; margin-top: 10px; }
.proc .idx { position: absolute; right: 18px; top: 16px; font-size: 11px; letter-spacing: .3em; color: var(--tx-3); }

/* 锚点定位时给固定页头让位 */
#home, #about, #services, #works, #process, #voices, #contact {
  scroll-margin-top: calc(var(--nav-h) + 2px);
}

/* ============ 13. Testimonials (dark deep) ============ */
.voices { background: var(--dark-2); border-top: 1px solid var(--line-soft); text-align: center; }
.voices-viewport { position: relative; max-width: 860px; margin-inline: auto; min-height: 210px; }
.voice {
  opacity: 0; position: absolute; inset: 0;
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transform: translateY(10px); visibility: hidden;
}
.voice.on { opacity: 1; transform: none; visibility: visible; position: relative; }
.voice q {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.8rem);
  line-height: 1.7; color: var(--tx);
  quotes: none; display: block;
}
.voice q::before { content: "“"; color: var(--gold); }
.voice q::after { content: "”"; color: var(--gold); }
[lang="en"] .voice q::before { content: "\201C"; }
[lang="en"] .voice q::after { content: "\201D"; }
.voice figcaption { margin-top: 22px; }
.voice figcaption b { font-size: 15px; letter-spacing: .1em; color: var(--gold-b); font-weight: 600; }
.voice figcaption span { display: block; font-size: 12.5px; letter-spacing: .24em; text-transform: uppercase; color: var(--tx-3); margin-top: 5px; }
.voices-nav { margin-top: 44px; display: flex; justify-content: center; align-items: center; gap: 26px; }
.voices-dots { display: flex; gap: 10px; }
.voices-dots button {
  width: 8px; height: 8px; border-radius: 50%;
  border: 1px solid var(--gold); transition: all .3s;
}
.voices-dots button.on { background: var(--gold); transform: scale(1.25); }
.voices-arrow {
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); display: grid; place-items: center;
  color: var(--tx-2); transition: all .35s var(--ease);
}
.voices-arrow:hover { border-color: var(--gold); color: var(--gold-b); }

/* ============ 14. Contact ============ */
.contact { background: var(--dark); position: relative; }
.contact::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 50% at 15% 10%, rgba(200,165,105,.07), transparent 60%);
}
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(48px, 7vw, 110px); align-items: start; position: relative; }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-top: 40px; }
.info-item h4 { font-size: 13px; letter-spacing: .24em; text-transform: uppercase; color: var(--gold); font-weight: 600; }
.info-item a, .info-item p { color: var(--tx); margin-top: 8px; font-size: 15px; word-break: break-all; }
.info-item a:hover { color: var(--gold-b); }
.contact-note { margin-top: 34px; font-size: 13px; color: var(--tx-3); letter-spacing: .06em; }

.contact-form {
  background: var(--dark-2);
  border: 1px solid var(--line-soft);
  padding: clamp(26px, 4vw, 52px);
  position: relative;
}
.contact-form::before {
  content: ""; position: absolute; inset: 0 auto auto 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--gold), transparent);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { position: relative; margin-top: 22px; }
.field input, .field textarea, .field select {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 12px 2px;
  color: var(--tx);
  font: inherit;
  font-size: 15px;
  transition: border-color .3s;
  border-radius: 0;
  -webkit-appearance: none;
}
.field select option { background: var(--dark-2); }
.field textarea { resize: vertical; min-height: 100px; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-bottom-color: var(--gold); }
.field label {
  position: absolute; left: 2px; top: 12px;
  color: var(--tx-3); font-size: 15px; pointer-events: none;
  transition: all .3s var(--ease); letter-spacing: .04em;
}
.field input:focus ~ label, .field input:not(:placeholder-shown) ~ label,
.field textarea:focus ~ label, .field textarea:not(:placeholder-shown) ~ label,
.field select:focus ~ label, .field select:valid ~ label {
  top: -12px; font-size: 11px; letter-spacing: .2em; color: var(--gold);
  text-transform: uppercase;
}
.field.require label::after { content: " *"; color: var(--gold); }
.form-tip { margin-top: 22px; font-size: 12px; color: var(--tx-3); letter-spacing: .05em; }
.form-msg {
  display: none; margin-top: 16px; padding: 12px 16px; font-size: 13.5px;
  border: 1px solid; letter-spacing: .04em;
}
.form-msg.ok { color: var(--gold-b); border-color: rgba(200,165,105,.4); }
.form-msg.err { color: #e08a80; border-color: rgba(224,138,128,.4); }
.contact-form .btn-gold { width: 100%; margin-top: 26px; }

/* ============ 15. Footer ============ */
.footer { background: #070709; border-top: 1px solid var(--line-soft); padding: clamp(50px, 6vw, 90px) 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: clamp(30px, 5vw, 70px); }
.footer .brand-cn { color: var(--tx); }
.footer-desc { color: var(--tx-2); font-size: 14px; margin-top: 18px; max-width: 340px; }
.footer-social { display: flex; gap: 12px; margin-top: 26px; }
.footer-social a {
  width: 38px; height: 38px; border: 1px solid var(--line);
  display: grid; place-items: center; font-size: 12px;
  color: var(--tx-2); letter-spacing: .1em;
  transition: all .35s var(--ease);
}
.footer-social a:hover { border-color: var(--gold); color: var(--gold-b); transform: translateY(-3px); }
.footer h4 { font-size: 13px; letter-spacing: .28em; text-transform: uppercase; color: var(--gold); font-weight: 600; margin-bottom: 22px; }
.footer ul { display: grid; gap: 12px; }
.footer ul a { color: var(--tx-2); font-size: 14px; transition: all .3s; }
.footer ul a:hover { color: var(--gold-b); padding-left: 8px; }
.footer-contact li { color: var(--tx-2); font-size: 14px; line-height: 2; word-break: break-all; }
.footer-contact i { color: var(--gold); font-style: normal; margin-right: 10px; font-size: 12px; }
.footer-bottom {
  margin-top: clamp(40px, 5vw, 64px);
  border-top: 1px solid var(--line-soft);
  padding: 22px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  color: var(--tx-3); font-size: 12.5px; letter-spacing: .06em;
}
.footer-bottom a:hover { color: var(--gold-b); }

/* Back to top */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 40;
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(10,10,12,.7);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  color: var(--gold-b); font-size: 16px;
  display: grid; place-items: center;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .4s var(--ease);
}
.to-top.on { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--gold); }

/* ============ 16. Responsive ============ */
@media (max-width: 1080px) {
  .nav-links, .nav-actions .btn { display: none; }
  .nav-toggle { display: block; }
  .nav-actions { margin-left: auto; }
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .sec-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .works-grid { grid-template-columns: 1fr; }
  .work:nth-child(even) { margin-top: 0; }
  .about-stats { grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .quote { background-attachment: scroll; }
}
@media (max-width: 640px) {
  :root { --nav-h: 70px; }
  .svc-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-media .frame { aspect-ratio: 3 / 4; }
  .about-stamp { width: 104px; height: 104px; right: -6px; bottom: 20px; }
  .hero-actions .btn { width: min(100%, 260px); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  *, *::before, *::after { animation-duration: .01ms !important; }
}